Certified Quantum Random Numbers from Untrusted Light

Drahi, D.; Walk, N.; Hoban, Matty J.; Fedorov, A. K.; Shakhovoy, R.; Feimov, A.; Kurochkin, Y.; Kolthammer, W. S.; Nunn, J.; Barrett, J. and Walmsley, I. A.. 2020. Certified Quantum Random Numbers from Untrusted Light. Physical Review X, 10(4), 041048. ISSN 2160-3308 [Article]

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Abstract or Description

A remarkable aspect of quantum theory is that certain measurement outcomes are entirely unpredictable to all possible observers. Such quantum events can be harnessed to generate numbers whose randomness is asserted based upon the underlying physical processes. We formally introduce, design and experimentally demonstrate an ultrafast optical quantum random number generator that uses a totally untrusted photonic source. While considering completely general quantum attacks, we certify and generate in real-time random numbers at a rate of 8.05 Gb/s with a rigorous security parameter of 10^(−10). Our security proof is entirely composable, thereby allowing the generated randomness to be utilised for arbitrary applications in cryptography and beyond. To our knowledge, this represents the fastest composably secure source of quantum random numbers ever reported.

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Optics, Quantum Information

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21 September 2020Accepted
9 December 2020Published Online
October 2020Published

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Date Deposited:

27 Nov 2020 09:51

Last Modified:

03 Aug 2021 15:05

Peer Reviewed:

Yes, this version has been peer-reviewed.



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